feat: initialize Next.js application with Tailwind CSS and custom global styles

- Added global CSS file with Tailwind CSS integration and custom styles for light and dark themes.
- Created layout component to manage global layout and font settings using Google Fonts.
- Developed home page with responsive design, including navigation and deployment links.
- Added TypeScript configuration for strict type checking and module resolution.
- Created an empty page for the RT guide section.

postcss.config.mjs

@@ -0,0 +1,5 @@
+const config = {
+  plugins: ["@tailwindcss/postcss"],
+};
+
+export default config;